Insulator.



N0.'s49,896. n PATENTED' Mme', 19o?.

c. GRIFFITH.

INSULATOR.

APPLIGATI'ON FILED MAE. 24. 190s /UJ $571655 65.' 111 lfm/MW:

-U IN I'IEI) STATES PATENT Urrutia'.

INSULATOR. f

Specification of Letters Patent.

Patented April 9, 1907.

Application filed March 24.1906. Serial No. 307,818.

.To all w/wm t muy concern:

Be it known that I, CHARLES GRIFFITH, a citizen of the United States of America, residingy at Elizabeth, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Im rovernents in Insulators, of which the fol owing is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in insulators. The invention relates more particularly to a novel form of insulator employed for supporting an electrical conduit within mines.

The primary object of my invention is to provide a sim le and inexpensive insulator to Which an e ectrical conduit can be easily and quickly detachably connected.

Another object of this invention is to dispense with the` wrappings heretofore employed in connection with insulators for rctaining the electrical conduit in engagement therewith, the operation of connecting a conduit to an insulator requiring considerable time and labor, which I aim to save by the novel construction of the insulator to bc hereinafter more fully described.

With the above and other objects in view, which Will more readily appear as the nature ofthe invention is understood, the same consists in the novel construction, combil'iation, and arrangement of parts, as will presently appear.

Referring to the drawings accompanying this application, like numerals of reference designate corresponding parts throughout the several views, in which Figure l is a front elevation of an insulator constructed in act-.ordance with my invention. Fig. 2 is :1 side elevation of the same. Fig. 3 is a vertical sectional view of the same, and Fig. 4 is a vertical transverse sectional view oi' the same.

To put my invention into practice, I preferably construct my improved insulator ol Wood, which serves functionally the same purpose porcelain and glass heretofore used. The insulator is substantially cylindrical and is provided with a verticallydisposed opening or bore l to receive the brackctor support in conncction with which it is used, said bracket or support being gens erallv-securcd to the side wall or ceiling of a mine to support an electrical conduit therein. The vertically-disposed opening' or bore 1 is formed eccentrically within the insulator relative to the periphery thereof, the object of which will presently appear.

-'Ihe one side of the insulator is recessed, as at 2, and the upper edge of said recess, as at 3, to receive an electrical conduit 1I. 'Io retain the electrical conduit within the recess of the insulator and against said lip, I p ivotally mount a cam-shaped member 5 within the recess, said member being retained therein by a pin or bolt 6 extending transversely thro ugh an opening 7 formed in the insulator. The cani-shaped portion of the member is provided with teeth or serrations H to engage thel underneath surface of thc electrical conduit 4 and retain it within thc cut-awa)V portion 3 of the insulator. To further insure the correct positioning of the conduit in thc insulator,I provide thc cum-shaped member 5 with a sidc llangc .l, said llange preventing thc conduit from slipping olli of the member 5 as said member impingcs the conduit and locks it therein.

To prevent the recess 2 and the cut-away portion Il thereof from weakening thc construction of the insulator, l have lormcdthe opening or bore l to one side ol' thc vcrtical axis thereof, this arrangement ol thc opening or bore l also serving to hold thc electrical conduit as far distant as possible from the bracket or support upon which the insulator is mounted. v

By the novcl construction ol' thc insulator and the manner ol' deta'clmbly connecting the conduit thereto my improved insulator is particularly adapted for use in mines, where the location of a conduit prevents thc same from being wrapped to :in insulator, also on account ol thc conduits ol' the mine being changed from time to timc.y While I have hcrcin described thc insulator as applicable lor mines, it is obvious that it may be readily uscd l'or other purposes. rl`hcrcl'mc I do not care to con'linc myscll' to its specific use.

While the preferred embodiments ol' my invention have bcen described and illustrated, l desire to be understood that such changt-s are permissible by the appended claim may be resorted to without departing l'rom thc spirit oll my invention.

Ilavinglully described myinvcntion, what I claim, and desire to secure by Letters Iatent, is--- An insulator comprising a body having a IOO 

